Steam Works is a Factorio mod adding a collection of additinal uses for steam. While currently small i am happy to implement more stuff if you have an idea.
A single unit of 500° steam contains 97 kJ. A single unit of 165°C steam contains 30 kJ. The steam-steam heat exchange produces 95 units of 165°C steam for every 30 units of 500°C steam consumed. The 2 units of steam missing from a perfect ratio correspond to a total loss of 2.06%.
The steam-steam heat exchange can be used to produce cool steam barrels from a nuclear reactor, but also for coal liquefaction.